If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Val Masino: The hottest months are usually July and August, with an average temperature of 11°C, while the coldest months are January and February, with an average of -5°C. The rainiest months in Val Masino are August, May, June and October, with each month seeing an average of 184 mm of rainfall.